164758505 has 8 divisors (see below), whose sum is σ = 198343752. Its totient is φ = 131384448.

The previous prime is 164758471. The next prime is 164758523. The reversal of 164758505 is 505857461.

It can be written as a sum of positive squares in 4 ways, for example, as 226576 + 164531929 = 476^2 + 12827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164758505 - 2¹² = 164754409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51074 + ... + 54203.

It is an arithmetic number, because the mean of its divisors is an integer number (24792969).

Almost surely, 2^164758505 is an apocalyptic number.

It is an amenable number.

164758505 is a deficient number, since it is larger than the sum of its proper divisors (33585247).

164758505 is a wasteful number, since it uses less digits than its factorization.

164758505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105595.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 164758505 is about 12835.8289564796. The cubic root of 164758505 is about 548.2129380529.

The spelling of 164758505 in words is "one hundred sixty-four million, seven hundred fifty-eight thousand, five hundred five".